#1 Masayoshi Son

Age: 48
Net Worth: $7 billion ^Married, 2 children

Chief executive of Softbank, Japan's leading Internet and telecom-services company. Thanks in part to several years of aggressive promotion, his IP phone/ADSL service now has more than 5 million subscribers. In March the company posted its first annual profit in 5 years. Stock doubled in past 12 months. Recently bought Vodafone's Japan unit for $17 billion.